AMD Radeon 780M, GPU acceleration not working in AppSandbox v0.1.4

#Hardware

• Mini PC: AZW SER8
• CPU: AMD Ryzen 7 8845HS
• GPU: AMD Radeon 780M integrated GPU
• OS: Windows 11 pro
• Frigate: Docker
• AppSandbox v0.1.4

Problem

I am trying to use the AMD Radeon 780M integrated GPU for hardware video decoding in Frigate.

According to the Frigate documentation, modern AMD GPUs are supported through VAAPI using the radeonsi driver and the preset-vaapi configuration.

I configured:

ffmpeg:
  hwaccel_args: preset-vaapi

and:

LIBVA_DRIVER_NAME: radeonsi

However, hardware video acceleration does not work correctly in AppSandbox.

With hardware acceleration disabled, the camera works correctly using software decoding.

The problem can be reproduced with a single camera, so this does not appear to be related to the number of cameras or the overall Frigate workload.

Expected behavior

The Radeon 780M should be detected and used by FFmpeg/Frigate for VAAPI hardware video decoding.

I would expect the corresponding DRM render device, for example:

/dev/dri/renderD128

to be available and usable by Frigate.

Actual behavior

When using:

ffmpeg:
  hwaccel_args: preset-vaapi

hardware video decoding fails.

When I remove the hardware acceleration configuration, the same camera stream works correctly with CPU/software decoding.

Therefore, the issue appears to specifically concern the VAAPI hardware acceleration path with the Radeon 780M.

Question

Is the AMD Radeon 780M fully supported for VAAPI hardware video decoding in Frigate when running inside AppSandbox?

If it is supported, what is the recommended configuration to make the Radeon 780M available to FFmpeg/VAAPI?

In particular, I would like to know whether there are any specific requirements for:

• /dev/dri/renderD128
• radeonsi
• Mesa VAAPI drivers
• FFmpeg VAAPI
• Radeon 780M / RDNA3

Relevant Frigate configuration

ffmpeg:
  hwaccel_args: preset-vaapi

Environment:

LIBVA_DRIVER_NAME: radeonsi

Additional information

The Radeon 780M is the integrated GPU of the AMD Ryzen 7 8845HS.

I am only testing hardware video decoding with one camera stream.

Software decoding works correctly, but hardware decoding with GPU does not.

Could you please advise whether this is a known limitation or whether additional configuration is required for the Radeon 780M?

Thank you.

Start with the AppSandbox environment and the Frigate ffmpeg hwaccel_args/preset-vaapi configuration; check whether /dev/dri/renderD128 is exposed and usable with LIBVA_DRIVER_NAME=radeonsi. Done means determining whether the Radeon 780M VAAPI path is supported in AppSandbox and documenting the required configuration or the limitation.